Self-aspirating hypodermic syringe and self-aspirating assembly therefor
US4333456A · kind A · utility
111Cited by
9References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 9, 1981 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Feb 9, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/2496
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hypodermic syringe of the automatic, or self-aspirating, type for use in combination with cartridge ampoules closed at the lower end by a rubber diaphragm pierceable by a double-ended hypodermic needle and closed at the upper end by a slidable rubber piston comprises a combination of a syringe holder unit and a self-aspirating assembly so-adapted to generate aspirating conditions in the ampoule by the slight backward displacement of the rubber piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.